Ordinance No. 20513 - Laserfiche WebLink

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Current conditions are highly altered from historical conditions with steeper banks, less water storage volume, less vegetated area, and shorter, narrower habitat corridors. Proposed modifications represent only modest returns toward historical conditions (Table 1). The substantial losses of these in relation to historical conditions are illustrated in Table 2 by the percent change of current and proposed conditions from historical = 100 %. Although the increased functionality of the proposed design represents only modest gains in relation to historical conditions, in some cases it represents substantial gains over current conditions, as seen in Table 2 in the second column for each function. Table 1. Comparison of Current, Historical and Proposed Function Metrics. Water Storage Volume Primary Production Area Habitat SuDDort Extent Table 2. Current and Proposed Aquatic Functions Capacity. For each category, the first column shows % changes from historical reference conditions as 100 %. "Change" for current conditions is based on historical conditions_ for nronosed conditions is based on current conditions. Avg. Bank Sloe Cubic Feet Production Square Feet Acres Linear Feet Width Ft Max / Min 2 yr FIdjgIn Historical 100% Change 100% Change 100% Historical 13% 812847 -75% 216759 4.98 15% 4076 176/12 Current 44% 159589 +5% 42557 0.98 5 r Fld ln -- - - - - -- 2468 34/9 Proposed 40% 182288 46684 1.07 Change 2684 52/9 5 yr Fld ln -- - - - - -- Change Current 20% -80% 17% -83% 9% -91% Historical 8% 16384 19% 32768 0.75 +11% 3787 56/2 Current 37% 2895 5789 0.13 100% 2456 7/1 Proposed 34% 3082 Current 6164 0.14 22% 2672 7/1 10 r FIdI21n Proposed 37% +32% 34% +55% 26% +8% 20+ r Fld In Historical 12% 54916 54916 1.26 Historical 3710 57/4 Current 35% 12127 Change 12127 028 -79 % 2457 19/3 Proposed 31% 18662 29% 18662 0.43 +82% 2673 19/3 20+ yr Fld In - - - - -- Historical 8% 5280 21120 0.48 3657 18/1 Current 34% 889 3556 0.08 2452 4/1 Proposed 30% 1658 6632 0.15 2668 4/1 Table 2. Current and Proposed Aquatic Functions Capacity. For each category, the first column shows % changes from historical reference conditions as 100 %. "Change" for current conditions is based on historical conditions_ for nronosed conditions is based on current conditions. 14 Water Storage Primary Production Habitat Support 2 Lr Fld In Historical 100% Change 100% Change 100% Change Current 25% -75% 20% -80% 15% -85% Proposed 27% +8% 21% +5% 22% +47% 5 r Fld ln -- - - - - -- Historical 100% Change 100% Change 100% Change Current 20% -80% 17% -83% 9% -91% Proposed 21% +5% 19% +12% 10% +11% 10 r Fld In Historical 100% Change 100% Change 100% Change Current 28% -72% 22% -78% 24% -76% Proposed 37% +32% 34% +55% 26% +8% 20+ r Fld In Historical 100% Change 100% Change 100% Change Current 21% -79 % 17% -83% 11% -89% Proposed 29% +38% 31% +82% 19% +73% 14